Assertion: When charges are shared between two parallel plate capacitors, a charge of the system is conserved, but some energy is lost.

Reason: During the sharing of charges, some energy is dissipated as heat.

Assertion:- On filling the space between the plates of a parallel plate air capacitor with a dielectric, the capacity of the capacitor is increased.

Reason:- The same amount of charge can be stored at a reduced potential.

Assertion: A parallel plate capacitor is connected across a battery through a key. A dielectric slab of dielectric constant $K$ is introduced between the plates. The energy which is stored becomes $K$ times.

Reason: The potential difference between the plates remains constant or unchanged.

Assertion: When a capacitor is charged by a battery, both the plates receive charges equal in magnitude, no matter whether the sizes of plates are identical or not.

Reason: The charge distribution on the plates of a capacitor is in accordance with the charge conservation principle.

Assertion: If three capacitors of capacitances $C_1< C_2< C_3$ are connected in series and parallel, then $C_{\mathrm{parallel}}>C_{\mathrm{series}}$.

Reason: $C_{\mathrm{series}}$$=C_1+C_2+C_3$

and $\frac{1}{C_{\mathrm{parallel}} }=\frac{1}{C_1}+\frac{1}{C_2}+\frac{1}{C_3}$

Assertion: Circuits containing high capacity capacitors, charged to high voltages should be handled with caution, even when the current in the circuit is switched off.

Reason: When an isolated capacitor is touched by hand or any other part of the human body, there is an easy path to the ground available for the discharge of the capacitor.

Assertion: The dipoles in a dielectric are not completely aligned in a weak external electric field.

Reason: Thermal energy tends to de-align them.